This high quality replacement battery is the best replacement for your phone and functions the same as the one that came with your phone. Just take off your battery cover and and replace it with this new one.
Please ensure that you drain the new battery completely then charge it for at least 12 hours. This will help you to get a good life time span and better usage from it..
The battery life of a handset can vary greatly depending on how you use your device, mains charger, cable and your battery charging habits.